Stove



July 29, 1941. c. EHRET. 2,250,859

STOVE Filed Jan. 7, 1939 3 Sheets-Sheet l INVENTOR. Clement Ehret BY I ATTORNEY.

C. EHRET July 29, 1941.

STOVE Filed Jan. '7, 1959 s Sheets-Shee. 2

INVENTOR. Clement Ehret BY. 0% ATTORNEY.

July 29, 1941. c, EH ET 2,250,859

STOVE Filed Jan. 7, 1939 3 Sheets-Sheet 3 v ATTORNEY.

Patented July 29, 1941 umrsn sr STOVE V Clement Ehret, White Plains, N. Y. Application January 7, 1939, Serial No. 249,673

14 Claims.

This application is a continuation in part of my copending Patent No. 2,143,411, issued on January 10, 1939, which was a division of my copending Patent No. 2,102,616, issued December 31, 1937, which disclose a stove having a rotatable stove bodyv mounted on a relatively fixed base and which stove body is provided with one or more ovens.

The present invention provides novel and efficient means to permit of the illumination of such ovens, so that roasts, etc., may be readily observed, and inspected without removing them from the ovens or opening the oven doors.

The invention further provides means whereby a transparent panel in an oven door may be wiped clean of vapor or other deposits, so that the interior of the oven may be readily seen therethrough and provision is made whereby this wiping operation will simultaneously act upon the illuminating means to remove like deposits therefrom,,the illuminating means and the wiping means being preferably interlocked, so that the illumination of the oven may be controlled through the operation of the wiping means.

Features of the invention, other than those adverted to, will be apparent from the hereinafter detailed description and claims, when read in conjunction with the accompanying draw m S. i

The accompanying drawings illustrate different practical embodiments of the invention, but the constructions therein shown are to be understood as illustrative, only, and not as definin'g the limits of the invention.

Figure 1 shows a stove embodying the present invention, partly in central vertical section in the plane of the line l! of Figure 2, and partly in elevation.

Figure 2 is an elevation of such stove, as viewed from the right hand side of Figure 1.

Figure 3 is a front to rear section through an oven showing a modified form of the invention wherein the illuminating means and a transparent panel in the oven door may be wiped clean of extraneous deposits. This section is taken substantially in the plane of the line 3-3 of Figure 4.

Figure 4 is a front elevation of the structure of Figure 3 with the oven door closed.

Figure 5 is a fragmental section taken substantially in the plane of the line 55 of Figure 3 with associated wiring diagram.

Figure 6 is a section perspective showing a further form of the invention.

Figures 7 and 8 are sections on the lines 'l'-'-'lv and8-8.-

Referring first to Figuresl and 2. of the drawings, I designates a suitable hollow standard, shown as comprising a relatively broad base 2 having an upstanding cylindrical portion?) The upper endof .the cylinder? is open, and projecting thereinto is. a hollow plunger .4, mounted within thecylinder .3 for rotation and vertical adjustment. This vertical adjustment .maybe accomplished in different ways andlbymeans of various types of mechanism, but, the. plunger. 4 is shown as threaded at 5 and 'cooperatingwith these threads is an adjusting handjwheelfi hav-l ing a threaded hub I. screwed on to the plunger, 4. In the under side of the hub I is formed a ball race and in the upper end of the cylinder wall isformed a complementary. ball race. and anti-friction bearings, 8 are housed within, these complementary ball races, so as to permit rotation of thehand .wheel 6 for the purpose of raise ing and lowering the plunger with respect, to one standard whenssaid plunger is held. against rotation. The. plunger. and hand wheel may also rota'te together while the base remains ,stationary. The upper endof the plungerv is fianged.at 9 and this flange is secured in any suitable way to the underside of. the. stove body, indicated generally by; the reference character Ill. The stove body may have. one .or more ovens and each oven may haveone .orv more doors.

The details of constructionof,v the stove body may, of .course, be varied withinwide limits de-. pending upon the type of ,fuel used and also. upon the views of different stove designers and the. present invention is to be understood as not limited to these details other than as hereinafter specifically pointed out as important to this th vention.. g

Gas is fed to the stove body through a pipe 32 rigid with the stove body and extending, downwardly within and coaxially with the plunger} and connected to a fuel .supply pipe 33 by any suitable connection which will preclude 'the'leak age of gas but which willpermitofrotation of the stove body and raising and loweringof the latter. An ordinary hose connection of flexible character will serve this purpose, but, for the purpose of illustratiornthe pipe 33. isshownas extending into thepipe 32 with..an associated packing gland or stufiing box 34 to preclude leakage- .This arrangement allows of rotation and change of elevation in the stove body without in-, terfering with the supply of fuel. The same general arrangement may be used to supply oil, if

the stove is an oil burner, and it will of course be understood that, in an electric stove, suitable wiring connections and heating elements will take the place of gas connections and burners.

One form of oven illuminating means which I have chosen as illustrative of the present invention is shown in detail in Figures 1 and 2 of the drawings. Here, such means embodies hinged housings 55 positioned over openings in the sides of the oven and each of which openings is closed at its inner side by a transparent or translucent window 56 of appropriate material to stand the heat of the oven, such as Pyrex glass. In each housing is mounted a lamp socket 51 adapted to receive an incandescent lamp 58 electric current to which is supplied through wires housed within conduits 59. These conduits lead to the interior of the hollow plunger 4 and additional conduits 60 lead to push buttons 6| or other manually controlled means positioned adjacent each oven door or in any other desired position. The wiring conections are indicated diagrammatically in Figure 1. Here, the wires 62 and 63 which feed this system are connected to brushes 64 and05, respectively, mounted .upon a ring of insulation 6,6 fixed on theinterior of the plunger 4. An insulating disk ,6] ,is supported on the lower end of the pipe 3,2 and held loosely between collars 68 and 60 screwed on to said pipe, so that the pipe 32 is free to rotate withinthe insulating disk which is raised and lowered with the stove body. The outer periphery of this disk 01 has one ,or ,more projections which extend into vertical keyways I4 in the ,cylinder wall, .so that, while the disk is free tolraise and lower with the stove body, it is heldagainstrotation .by the keyways 14.

.On this insulating disk.6l is mounted two commutator rings 10 and ,H engaged by .the brushes 64 and 65, respectively, at all times and these commutator rings are fed by wires I2 which form parts .of .a feed .cable 13, looped within the hollowbase to allow of raising and lowering movement of the stove body while permitting uninterrupted feed of current to the wires .02 and .03.

When a person desires to inspect the contents of the oven, .one of .the push buttons 6I may be pressed to energize the lamps .58 and illuminatethe entire interior-f the oven. The sources of illumination may be placed otherwise than specified, but the showing of the drawings is not only convenient, but thoroughly efficient. Ihe advantage of placing the lamps 58 in housings, hinged to the stove body, is that these housings may be open at any time for replacement of lamps, and while the lamps are thus positioned to properly illuminate the interior of the oven, they are removed from the direct heat or vapor from the latter. The housings for the illuminating means may be mounted either inside or outside the oven and should .be ventilated to the atmosphere by perforations or holes to preclude fogging of the lamps.

Each of the .oven .doors is provided with a transparent panel 50, e. g., pyrex glass or the like which is able to withstand the heat of the oven. By this means it is possible to observe the interior of the oven .and the contents thereof, while the same is illuminated by the lamp or lamps Y58 and without necessitating the opening of the door. Panel 50 may, if desired, be in the form ,of a magnifying glass or lens.

It will of course be understood that, while I have shown the stove body in considerable detail in the drawings, I do not wish to limit the present invention in this connection for any appropriate stove body may be employed in connection with this invention.

In Figures 3, 4 and 5 I have illustrated a modified form of the invention. Here the oven IOI has a drop door I02 hinged at I03 at its bottom and this door has a transparent panel I04 through which the interior of the oven may be observed. The panel I04 is set into the door so as to be flush with the inner face thereof and supported by the oven, immediately above the door, is a light casing I05 which has a light penetrable panel I06 facing rearwardly into the confines of the oven and lying in substantially the same plane as the panel I04. In this housing I05 is enclosed a lamp I01, shown as of elongated form and mounted in any appropriate socket, so that it can be readily changed. When the lamp is lit it will illuminate the interior of the oven through the panel I06 and such illuminated interior may be viewed fromthe exterior of the oven through the panel I04.

The lamp and wiper are shown as mounted at the upper .portion of the oven but they may be mounted atthe side or bottom thereof or in any other convenient position. Furthermore, the lampmounting may be made accessible from the outside of the oven.

When an oven is in use the panels I04 and I06 both tend to accumulate steam and other extraneous matter which interferes with their proper functions andit is desirable therefore .to clean or wipe these panels free from such deposits when theyare to be .used to view the .contents of the oven. The presentinvention provides a wiper which may be operated to wipe both panels. This wiper, indicated at I08, may conveniently comprise asbestos wool or any other suitable material of a non-combustible nature and it is mounted upon an arm I09 which extends through a slot H0 in the inner side wall of the oven and is rigidly secured to a spindle III mounted for oscillation on the oven body. This spindle extends through the front wall of the oven and carries a handle 2 by means of which it may be oscillated, so as to cause the wiper to traverse both the panels I04 and I06. The arm I09 is preferably of a resilient character so as to hold the wiper I08 firmly against the panels when the oven door is closed. Thus a person desiring to View the interior of the oven may operate the handle I I2 and thereby move the wiper over the panel I04 of the door, so as to obtain a clear vision into the interior of the oven. At the same time continued travel of the wiper above the door opening will cause it to traverse the panel I06 back of the lamp and thus keep this panel clean, so that the oven may be efficiently illuminated from such lamp. The oven door is shown as fitting flush with the lamp housing I05, so as to provide for substantially uninterrupted travel of the wiper from one'panel to the other.

The control of the lamp may be accomplished in various ways as by a manually operable switch, but -I preferably make this control automatic and interlock the same with the wiper. Thus, as shown best in Figure 5, the lamp I0'I is-included in a circuit II3 fed from any suitable external source of current supply .I I4 and in this circuit is also included two brush contacts H5 and I I6. These brush contacts are supported on a housing II! which embraces the spindle III of the wiper and is supported rigidly inposition with respect to the oven body. The contact brushes are, moreover, insulated with respect to this casing II'I and with respect to the casing III and to each other and they are adapted to ride upon a ring of insulation H8 fixed on the spindle III. Set into this ring of insulation is a conductor bridge I I9 of such size that, when the wiper is in a predetermined position, the conductor II9 will bridge the brush contacts and complete the circult to the lamp IIlI.

The parts may be so arranged that the lamp can be lit in any predetermined position of the wiper, but I prefer to have the wiper operate throughout the major portion of its swing without affecting the lamp and to only close the circuit when the wiper is in its lowermost position substantially as indicated in Figure 4.

With this arrangement the user of the stove may operate the wiper to clean the panels and then, by moving the wiper to its lowermost position, energize the lamp and illuminate the oven, so as to render the interior thereof visible through the door panel. When the wiper is not in use, it is swung in a clockwise direction into the idle position of Figure 3, where it is out of contact with the door and free and clear of the door opening and wherein the circuit to the lamp is broken. In other words, the wiper is movable into a position wherein it is removed from the door and the door opening of the oven, so as to leave said door opening unobstructed by the wiper, whereby large roasts may be moved into and out of the oven without fear of contact with the wiper. Furthermore the wiper in this position is entirely out of the way for it is mounted on and supported by the stove body independently of the oven door and consequently the door is wholly unencumbered when it is opened. So far as I am aware no structure of this kind has ever before been proposed. Such wipers as have been suggested have been mounted on the oven door and not independently of the door and consequently they constitute an encumbrance on the door which is particularly undesirable and annoying when the door is open.

I wish it understood that the structure which I have shown in Figures 3, 4, and 5, and similar structures of which this disclosure is merely illustrative, may be employed in stoves of all kinds, employing any kind of fuel and irrespective of vertical or rotary adjustment of a stove body. In fact, this embodiment of the invention may be used on any of the types of stoves now in use in general application and will be found to give highly satisfactory results in this regard. It may also be used to advantage in a stove of the character shown in Figures 1 and 2, wherein the stove body is rotatable and vertically adjustable with respect to the base. In which latter case, current may be fed to the lamp IIJI- through connections like those disclosed in Figures 1 and 2, so as to permit of such adjustments without interfering with the feed of current to the lamp. Likewise the oven doors of Figures 1 and 2 may be equipped with wipers of the character shown in Figures 3, 4 and 5, and they may control the circuits to the lamps which illuminate the interior of the oven. In Figures 1 and 2, the illustrative fuel for the stove heating elements is gas and thus independent electric wiring must be used for the lamps to illuminate the ovens and this applies in all cases where other than electricity is used as the heating medium.

It will be understood, however, that with electric stoves and where the electricity is the heating medium, the circuits of the oven illuminating lamps may be coupled in multiple into the heating element circuits with the control switches in the lamp circuit.

Figures 6-8 show another form of the invention. Here the stove body I20 is so formed as to provide, adjacent the front of the oven, a recess or seat I2I having the cross section of a quarter of a circle and in this recess is seated a substantially cylindrical lamp housing I22. This housing is supported for axial rotation by means of a trunnion I23 at one end and a relatively rigid tubular shaft I24 at the other end. A lamp socket I25 is fixed on the inner end of this shaft and detachably supports a lamp I 26. Wires for feeding electric current to the lamp lead through the hollow shaft I24 to contacts I21 and I28, fixed on an insulating rotor rigid with the shaft. The rotor is enclosed. within a cap I29 carrying a strip of insulation I30 and this strip carries brushes I3I and I 32 to coact with the contacts I21 and I28. A handle I33 is attached to the outer end of the shaft to rotate the latter so that in one position the contacts will feed current to the lamp I26 and in other positions the lamp will be de-energized.

The parts are so related that, when the lamp is illuminated, an opening I34 in the wall of the lamp housing will be exposed to the interior of the oven and the latter will be illuminated by the lamp. When the housing is rotated to shut off the current to the lamp the opening I34 will move into juxtaposition with the seat I2I and seal the oven against loss of heat at this point. Vent openings I35 in the lamp housing I22, at this time, vent the interior of said housing to the atmosphere to keep the lamp from fogging. The oven door is indicated at I36 and its transparent panel at I31. A wiper is associated with the panel but is not shown in these figures.

The rotary construction of Figures 6-8 may be placed in a convenient position with respect to the oven and its incorporation into the stove construction may be accomplished in other ways without departing from this invention.

Having thus fully described the invention, what I claim as new and desire to secure by Letters Patent is:

1. A stove comprising a stove body including an oven having a door, a transparent panel in said door, a lamp for illuminatingthe interior of the oven, a lamp housing enclosing the lamp and having a light penetrable panel, and a wiper operable to wipe the panels of both the door and lamp housing.

2. A stove comprising a stove body including an oven having a door, a transparent panel in I said door,'a lamp for illuminating the interior of the oven, a lamp housing enclosing the lamp and having a light penetrable panel, a wiper mechanism including a wiper operable to wipe the panels of both the door and lamp housing, and a lamp controlling switch operatively connected to the wiper mechanism and controlled thereby.

3. A stove comprising a stove body including an oven and having a transparent observation panel in at least one of the walls thereof, a light housing for illuminating the interior of the oven and having a light penetrable panel in one of its walls, and a wiper mounted to traverse the faces of both of said panels.

4. A stove comprising a stove body including an oven and having a transparent observation panel in one of the walls thereof, a light housing for illuminating the interior of the oven and having a light penetrable panel in one of its walls, a wiper mechanism including a wiper mounted to traverse the faces of both of said panels, a lamp in the lamp housing, and a lamp energizing circuit including a switch operatively connected to the wiper mechanism and controlled thereby.

5. A stove comprising a stove body including an oven and having a transparent observation panel in one of the walls thereof, a light housing for illuminating the interior of the oven and having a light penetrable panel in, one of its walls. and a wiper mounted to traverse the faces of both of said panels, a lamp in the lamp housing, and a circuit including the lampand a switch, said switch being operably interlocked with the wiper to close the circuit to the lamp when the wiper is in a predetermined position.

6. A stove comprising an oven having a transparent observation panel in one of its walls, a wiper for wiping the inner face of said panel, a lamp for illuminating the interior of the oven, a lamp circuit including a switch, and a manually operable member operatively connected to both the wiper and the switch to control the operations of both of them.

7. A stove comprising a stove body including an oven having a door, a transparent panel in said door, a lamp for illuminating the interior of the oven, a circuit including said lamp, a wiper operable to wipe the inner face of said panel, a switch included in said circuit for con trolling the operations of said lamp, and a com-- mon operating member connecting with both the wiper and the switch for operating both of them.

'8. A stove comprising a stove body including an oven having a door, a transparent panel in said door, a lamp for illuminating the interior of the oven, a circuit including said lamp, a wiper operable to wipe the inner face of said panel, a switch included in said circuit for controlling the operations of said lamp, and a common operating member connecting with both the wiper and the switch for operating both of them, said switch being set to close the'circuit to the lamp only when the wiper is in predetermined positions, with the lamp deenergized when the wiper is in other positions.

9. A stove comprising a stove bodyincluding an 'oven, a light housing for illuminating the interior of the oven and having a light penetrable panel in one of its walls through which light may pass into the interior of the oven, a wiper mounted to traverse the face of said panel which is exposed to the oven interior, a lamp in the lamp housing, a circuit including the lamp and a switch, and a common operating member connecting with both the wiper and the switch for operating both of them.

10. A stove comprising a stove body including an oven, an oven door mounted on the stove body to open and close the oven, a transparent panel in said door, a wiper operable on the inner face of the transparent door panel when the door is closed and supported on the stove body independently of said oven door, whereby said oven door is wholly unencumbered by the wiper.

11. A stove comprising a stove body including an oven provided with a door opening, an oven door mounted on the stove body to open and close the door opening of the oven, a transparent panel in said door, and a wiper operable on the inner face of the transparent door panel when the door is closed and supported on the stove body independently of said oven door, whereby said oven dooris wholly unencumbered by the wiper, said wiper being movable into a position removed from said door and door opening to leave the door opening of the oven unobstructed by the wiper.

12. A stove comprising a stove body including an oven, an oven door mounted on the stove body to open and close the oven, a transparent panel in said door, a shaft supported by the stove body independently of said door and extending from the exterior to the interior of the stove body externally of the confines of the door, a wiper supported on the shaft interiorly of the stove body and operable by said shaft to wipe the inner faces of said panel when the door is closed, and an operating handle on said shaft exteriorly of the stove body.

13. A stove comprising a stove body including an oven, an oven door mounted on the stove body to open and close the oven, a transparent panel in said door, a shaft supported by the stove body independently of said door and extending from the exterior to the interior of the stove body externally of the confines of the door, a wiper supported on the shaft interiorly of the stove body and operable by said shaft to wipe the inner face of said panel when the door is closed, an operating handle on said shaft exteriorly of the stove body, a lamp'positioned to illuminate the interior of the oven, a circuit including said lamp, and a switch in said circuit connected to said shaft to be operated therewith, whereby said handle controls the operations of both the wiper and the lamp.

14. A stove comprising a stove body including an oven, an oven door mounted on the stove body to open and close the oven, a transparent panel in said door, a shaft supported by the stove body independently of said door'and extending from the exterior to the interior of the stove body externally of the confines of the door, a wiper supported on the shaft interiorly of the stove body and operable by said shaft to wipe the inner face of said panel when the door is closed, an operating handle on said shaft exteriorly of the stove body, a lamp positioned to illuminate the interior of the oven, a circuit including said lamp, and a switch in said circuit connected to said shaft to be operated therewith, whereby said handle controls the operations of both the wiper and the lamp, said switch being set to close the circuit to the lamp when the wiper is in predetermined positions while in other positions of the wiper the lamp is deenergized.

CLEMENT EHRE-T. 

